And these above-mentioned are not the only distinctions; but some things afford good juices, others bad, which two kinds the Greeks term euchyma and cacochyma[ AY ]; some are mild, others acrid; some generate in us a thicker phlegm, others a more fluid; some agree with the stomach, others not; likewise some produce flatulencies, others have not that property; some heat, others cool; some readily turn sour in the stomach, others are not easily corrupted there; some open the belly, others bind it; some promote urine, others retard it; some are soporiferous, others excite the senses. Now all these must be known for this reason, that different things are proper in different constitutions or states of health.